#container {
    width: 700px;
    margin: auto;

    border-radius: 25px;
}


#top {
    width: 700px;
    height: 200px;
    background-color: deeppink;

    border-radius: 25px;
}



#left {
    width: 180px;
    height: 600px;
    float: left;
    background-color: red;
    margin-top: 2px;

    border-radius: 25px;
}


#right {
    width: 518px;
    height: 600px;
    float: left;
    background-color: green;
    margin-left: 2px;
    margin-top: 2px;

    border-radius: 25px;
}